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Merge branch 'master' of git://1984.lsi.us.es/nf-next 

Pablo Neira Ayuso says:

====================
This batch contains netfilter updates for you net-next tree, they are:

* The new connlabel extension for x_tables, that allows us to attach
  labels to each conntrack flow. The kernel implementation uses a
  bitmask and there's a file in user-space that maps the bits with the
  corresponding string for each existing label. By now, you can attach
  up to 128 overlapping labels. From Florian Westphal.

* A new round of improvements for the netns support for conntrack.
  Gao feng has moved many of the initialization code of each module
  of the netns init path. He also made several code refactoring, that
  code looks cleaner to me now.

* Added documentation for all possible tweaks for nf_conntrack via
  sysctl, from Jiri Pirko.

* Cisco 7941/7945 IP phone support for our SIP conntrack helper,
  from Kevin Cernekee.

* Missing header file in the snmp helper, from Stephen Hemminger.

* Finally, a couple of fixes to resolve minor issues with these
  changes, from myself.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2013-01-27 00:56:10 -05:00
parent 93b9c1ddd3 5f9f946b39
commit b640bee6d9
43 changed files with 1312 additions and 436 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

176
Documentation/networking/nf_conntrack-sysctl.txt Normal file
View File

@ -0,0 +1,176 @@
/proc/sys/net/netfilter/nf_conntrack_* Variables:
nf_conntrack_acct - BOOLEAN
0 - disabled (default)
not 0 - enabled
Enable connection tracking flow accounting. 64-bit byte and packet
counters per flow are added.
nf_conntrack_buckets - INTEGER (read-only)
Size of hash table. If not specified as parameter during module
loading, the default size is calculated by dividing total memory
by 16384 to determine the number of buckets but the hash table will
never have fewer than 32 or more than 16384 buckets.
nf_conntrack_checksum - BOOLEAN
0 - disabled
not 0 - enabled (default)
Verify checksum of incoming packets. Packets with bad checksums are
in INVALID state. If this is enabled, such packets will not be
considered for connection tracking.
nf_conntrack_count - INTEGER (read-only)
Number of currently allocated flow entries.
nf_conntrack_events - BOOLEAN
0 - disabled
not 0 - enabled (default)
If this option is enabled, the connection tracking code will
provide userspace with connection tracking events via ctnetlink.
nf_conntrack_events_retry_timeout - INTEGER (seconds)
default 15
This option is only relevant when "reliable connection tracking
events" are used. Normally, ctnetlink is "lossy", that is,
events are normally dropped when userspace listeners can't keep up.
Userspace can request "reliable event mode". When this mode is
active, the conntrack will only be destroyed after the event was
delivered. If event delivery fails, the kernel periodically
re-tries to send the event to userspace.
This is the maximum interval the kernel should use when re-trying
to deliver the destroy event.
A higher number means there will be fewer delivery retries and it
will take longer for a backlog to be processed.
nf_conntrack_expect_max - INTEGER
Maximum size of expectation table. Default value is
nf_conntrack_buckets / 256. Minimum is 1.
nf_conntrack_frag6_high_thresh - INTEGER
default 262144
Maximum memory used to reassemble IPv6 fragments. When
nf_conntrack_frag6_high_thresh bytes of memory is allocated for this
purpose, the fragment handler will toss packets until
nf_conntrack_frag6_low_thresh is reached.
nf_conntrack_frag6_low_thresh - INTEGER
default 196608
See nf_conntrack_frag6_low_thresh
nf_conntrack_frag6_timeout - INTEGER (seconds)
default 60
Time to keep an IPv6 fragment in memory.
nf_conntrack_generic_timeout - INTEGER (seconds)
default 600
Default for generic timeout. This refers to layer 4 unknown/unsupported
protocols.
nf_conntrack_helper - BOOLEAN
0 - disabled
not 0 - enabled (default)
Enable automatic conntrack helper assignment.
nf_conntrack_icmp_timeout - INTEGER (seconds)
default 30
Default for ICMP timeout.
nf_conntrack_icmpv6_timeout - INTEGER (seconds)
default 30
Default for ICMP6 timeout.
nf_conntrack_log_invalid - INTEGER
0 - disable (default)
1 - log ICMP packets
6 - log TCP packets
17 - log UDP packets
33 - log DCCP packets
41 - log ICMPv6 packets
136 - log UDPLITE packets
255 - log packets of any protocol
Log invalid packets of a type specified by value.
nf_conntrack_max - INTEGER
Size of connection tracking table. Default value is
nf_conntrack_buckets value * 4.
nf_conntrack_tcp_be_liberal - BOOLEAN
0 - disabled (default)
not 0 - enabled
Be conservative in what you do, be liberal in what you accept from others.
If it's non-zero, we mark only out of window RST segments as INVALID.
nf_conntrack_tcp_loose - BOOLEAN
0 - disabled
not 0 - enabled (default)
If it is set to zero, we disable picking up already established
connections.
nf_conntrack_tcp_max_retrans - INTEGER
default 3
Maximum number of packets that can be retransmitted without
received an (acceptable) ACK from the destination. If this number
is reached, a shorter timer will be started.
nf_conntrack_tcp_timeout_close - INTEGER (seconds)
default 10
nf_conntrack_tcp_timeout_close_wait - INTEGER (seconds)
default 60
nf_conntrack_tcp_timeout_established - INTEGER (seconds)
default 432000 (5 days)
nf_conntrack_tcp_timeout_fin_wait - INTEGER (seconds)
default 120
nf_conntrack_tcp_timeout_last_ack - INTEGER (seconds)
default 30
nf_conntrack_tcp_timeout_max_retrans - INTEGER (seconds)
default 300
nf_conntrack_tcp_timeout_syn_recv - INTEGER (seconds)
default 60
nf_conntrack_tcp_timeout_syn_sent - INTEGER (seconds)
default 120
nf_conntrack_tcp_timeout_time_wait - INTEGER (seconds)
default 120
nf_conntrack_tcp_timeout_unacknowledged - INTEGER (seconds)
default 300
nf_conntrack_timestamp - BOOLEAN
0 - disabled (default)
not 0 - enabled
Enable connection tracking flow timestamping.
nf_conntrack_udp_timeout - INTEGER (seconds)
default 30
nf_conntrack_udp_timeout_stream2 - INTEGER (seconds)
default 180
This extended timeout will be used in case there is an UDP stream
detected.

3
include/linux/netfilter/nf_conntrack_sip.h
View File

@ -4,12 +4,15 @@
#include <net/netfilter/nf_conntrack_expect.h>
#include <linux/types.h>
#define SIP_PORT 5060
#define SIP_TIMEOUT 3600
struct nf_ct_sip_master {
unsigned int register_cseq;
unsigned int invite_cseq;
__be16 forced_dport;
};
enum sip_expectation_classes {

6
include/net/netfilter/nf_conntrack_acct.h
View File

@ -57,7 +57,9 @@ static inline void nf_ct_set_acct(struct net *net, bool enable)
net->ct.sysctl_acct = enable;
}
extern int nf_conntrack_acct_init(struct net *net);
extern void nf_conntrack_acct_fini(struct net *net);
extern int nf_conntrack_acct_pernet_init(struct net *net);
extern void nf_conntrack_acct_pernet_fini(struct net *net);
extern int nf_conntrack_acct_init(void);
extern void nf_conntrack_acct_fini(void);
#endif /* _NF_CONNTRACK_ACCT_H */

15
include/net/netfilter/nf_conntrack_core.h
View File

@ -25,12 +25,19 @@ extern unsigned int nf_conntrack_in(struct net *net,
unsigned int hooknum,
struct sk_buff *skb);
extern int nf_conntrack_init(struct net *net);
extern void nf_conntrack_cleanup(struct net *net);
extern int nf_conntrack_init_net(struct net *net);
extern void nf_conntrack_cleanup_net(struct net *net);
extern int nf_conntrack_proto_init(struct net *net);
extern void nf_conntrack_proto_fini(struct net *net);
extern int nf_conntrack_proto_pernet_init(struct net *net);
extern void nf_conntrack_proto_pernet_fini(struct net *net);
extern int nf_conntrack_proto_init(void);
extern void nf_conntrack_proto_fini(void);
extern int nf_conntrack_init_start(void);
extern void nf_conntrack_cleanup_start(void);
extern void nf_conntrack_init_end(void);
extern void nf_conntrack_cleanup_end(void);
extern bool

19
include/net/netfilter/nf_conntrack_ecache.h
View File

@ -207,9 +207,11 @@ nf_ct_expect_event(enum ip_conntrack_expect_events event,
nf_ct_expect_event_report(event, exp, 0, 0);
}
extern int nf_conntrack_ecache_init(struct net *net);
extern void nf_conntrack_ecache_fini(struct net *net);
extern int nf_conntrack_ecache_pernet_init(struct net *net);
extern void nf_conntrack_ecache_pernet_fini(struct net *net);
extern int nf_conntrack_ecache_init(void);
extern void nf_conntrack_ecache_fini(void);
#else /* CONFIG_NF_CONNTRACK_EVENTS */
static inline void nf_conntrack_event_cache(enum ip_conntrack_events event,
@ -232,12 +234,21 @@ static inline void nf_ct_expect_event_report(enum ip_conntrack_expect_events e,
u32 portid,
int report) {}
static inline int nf_conntrack_ecache_init(struct net *net)
static inline int nf_conntrack_ecache_pernet_init(struct net *net)
{
return 0;
}
static inline void nf_conntrack_ecache_fini(struct net *net)
static inline void nf_conntrack_ecache_pernet_fini(struct net *net)
{
}
static inline int nf_conntrack_ecache_init(void)
{
return 0;
}
static inline void nf_conntrack_ecache_fini(void)
{
}
#endif /* CONFIG_NF_CONNTRACK_EVENTS */

7
include/net/netfilter/nf_conntrack_expect.h
View File

@ -69,8 +69,11 @@ struct nf_conntrack_expect_policy {
#define NF_CT_EXPECT_CLASS_DEFAULT 0
int nf_conntrack_expect_init(struct net *net);
void nf_conntrack_expect_fini(struct net *net);
int nf_conntrack_expect_pernet_init(struct net *net);
void nf_conntrack_expect_pernet_fini(struct net *net);
int nf_conntrack_expect_init(void);
void nf_conntrack_expect_fini(void);
struct nf_conntrack_expect *
__nf_ct_expect_find(struct net *net, u16 zone,

4
include/net/netfilter/nf_conntrack_extend.h
View File

@ -22,6 +22,9 @@ enum nf_ct_ext_id {
#endif
#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
NF_CT_EXT_TIMEOUT,
#endif
#ifdef CONFIG_NF_CONNTRACK_LABELS
NF_CT_EXT_LABELS,
#endif
NF_CT_EXT_NUM,
};
@ -33,6 +36,7 @@ enum nf_ct_ext_id {
#define NF_CT_EXT_ZONE_TYPE struct nf_conntrack_zone
#define NF_CT_EXT_TSTAMP_TYPE struct nf_conn_tstamp
#define NF_CT_EXT_TIMEOUT_TYPE struct nf_conn_timeout
#define NF_CT_EXT_LABELS_TYPE struct nf_conn_labels
/* Extensions: optional stuff which isn't permanently in struct. */
struct nf_ct_ext {

7
include/net/netfilter/nf_conntrack_helper.h
View File

@ -82,8 +82,11 @@ static inline void *nfct_help_data(const struct nf_conn *ct)
return (void *)help->data;
}
extern int nf_conntrack_helper_init(struct net *net);
extern void nf_conntrack_helper_fini(struct net *net);
extern int nf_conntrack_helper_pernet_init(struct net *net);
extern void nf_conntrack_helper_pernet_fini(struct net *net);
extern int nf_conntrack_helper_init(void);
extern void nf_conntrack_helper_fini(void);
extern int nf_conntrack_broadcast_help(struct sk_buff *skb,
unsigned int protoff,

11
include/net/netfilter/nf_conntrack_l3proto.h
View File

@ -76,11 +76,16 @@ struct nf_conntrack_l3proto {
extern struct nf_conntrack_l3proto __rcu *nf_ct_l3protos[AF_MAX];
/* Protocol registration. */
extern int nf_conntrack_l3proto_register(struct net *net,
/* Protocol pernet registration. */
extern int nf_ct_l3proto_pernet_register(struct net *net,
struct nf_conntrack_l3proto *proto);
extern void nf_conntrack_l3proto_unregister(struct net *net,
extern void nf_ct_l3proto_pernet_unregister(struct net *net,
struct nf_conntrack_l3proto *proto);
/* Protocol global registration. */
extern int nf_ct_l3proto_register(struct nf_conntrack_l3proto *proto);
extern void nf_ct_l3proto_unregister(struct nf_conntrack_l3proto *proto);
extern struct nf_conntrack_l3proto *nf_ct_l3proto_find_get(u_int16_t l3proto);
extern void nf_ct_l3proto_put(struct nf_conntrack_l3proto *p);

10
include/net/netfilter/nf_conntrack_l4proto.h
View File

@ -121,12 +121,16 @@ extern struct nf_conntrack_l4proto *
nf_ct_l4proto_find_get(u_int16_t l3proto, u_int8_t l4proto);
extern void nf_ct_l4proto_put(struct nf_conntrack_l4proto *p);
/* Protocol registration. */
extern int nf_conntrack_l4proto_register(struct net *net,
/* Protocol pernet registration. */
extern int nf_ct_l4proto_pernet_register(struct net *net,
struct nf_conntrack_l4proto *proto);
extern void nf_conntrack_l4proto_unregister(struct net *net,
extern void nf_ct_l4proto_pernet_unregister(struct net *net,
struct nf_conntrack_l4proto *proto);
/* Protocol global registration. */
extern int nf_ct_l4proto_register(struct nf_conntrack_l4proto *proto);
extern void nf_ct_l4proto_unregister(struct nf_conntrack_l4proto *proto);
static inline void nf_ct_kfree_compat_sysctl_table(struct nf_proto_net *pn)
{
#if defined(CONFIG_SYSCTL) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT)

58
include/net/netfilter/nf_conntrack_labels.h Normal file
View File

@ -0,0 +1,58 @@
#include <linux/types.h>
#include <net/net_namespace.h>
#include <linux/netfilter/nf_conntrack_common.h>
#include <linux/netfilter/nf_conntrack_tuple_common.h>
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_extend.h>
#include <uapi/linux/netfilter/xt_connlabel.h>
struct nf_conn_labels {
u8 words;
unsigned long bits[];
};
static inline struct nf_conn_labels *nf_ct_labels_find(const struct nf_conn *ct)
{
#ifdef CONFIG_NF_CONNTRACK_LABELS
return nf_ct_ext_find(ct, NF_CT_EXT_LABELS);
#else
return NULL;
#endif
}
static inline struct nf_conn_labels *nf_ct_labels_ext_add(struct nf_conn *ct)
{
#ifdef CONFIG_NF_CONNTRACK_LABELS
struct nf_conn_labels *cl_ext;
struct net *net = nf_ct_net(ct);
u8 words;
words = ACCESS_ONCE(net->ct.label_words);
if (words == 0 || WARN_ON_ONCE(words > 8))
return NULL;
cl_ext = nf_ct_ext_add_length(ct, NF_CT_EXT_LABELS,
words * sizeof(long), GFP_ATOMIC);
if (cl_ext != NULL)
cl_ext->words = words;
return cl_ext;
#else
return NULL;
#endif
}
bool nf_connlabel_match(const struct nf_conn *ct, u16 bit);
int nf_connlabel_set(struct nf_conn *ct, u16 bit);
int nf_connlabels_replace(struct nf_conn *ct,
const u32 *data, const u32 *mask, unsigned int words);
#ifdef CONFIG_NF_CONNTRACK_LABELS
int nf_conntrack_labels_init(void);
void nf_conntrack_labels_fini(void);
#else
static inline int nf_conntrack_labels_init(void) { return 0; }
static inline void nf_conntrack_labels_fini(void) {}
#endif

8
include/net/netfilter/nf_conntrack_timeout.h
View File

@ -76,15 +76,15 @@ nf_ct_timeout_lookup(struct net *net, struct nf_conn *ct,
}
#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
extern int nf_conntrack_timeout_init(struct net *net);
extern void nf_conntrack_timeout_fini(struct net *net);
extern int nf_conntrack_timeout_init(void);
extern void nf_conntrack_timeout_fini(void);
#else
static inline int nf_conntrack_timeout_init(struct net *net)
static inline int nf_conntrack_timeout_init(void)
{
return 0;
}
static inline void nf_conntrack_timeout_fini(struct net *net)
static inline void nf_conntrack_timeout_fini(void)
{
return;
}

21
include/net/netfilter/nf_conntrack_timestamp.h
View File

@ -48,15 +48,28 @@ static inline void nf_ct_set_tstamp(struct net *net, bool enable)
}
#ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
extern int nf_conntrack_tstamp_init(struct net *net);
extern void nf_conntrack_tstamp_fini(struct net *net);
extern int nf_conntrack_tstamp_pernet_init(struct net *net);
extern void nf_conntrack_tstamp_pernet_fini(struct net *net);
extern int nf_conntrack_tstamp_init(void);
extern void nf_conntrack_tstamp_fini(void);
#else
static inline int nf_conntrack_tstamp_init(struct net *net)
static inline int nf_conntrack_tstamp_pernet_init(struct net *net)
{
return 0;
}
static inline void nf_conntrack_tstamp_fini(struct net *net)
static inline void nf_conntrack_tstamp_pernet_fini(struct net *net)
{
return;
}
static inline int nf_conntrack_tstamp_init(void)
{
return 0;
}
static inline void nf_conntrack_tstamp_fini(void)
{
return;
}

4
include/net/netns/conntrack.h
View File

@ -84,6 +84,10 @@ struct netns_ct {
int sysctl_auto_assign_helper;
bool auto_assign_helper_warned;
struct nf_ip_net nf_ct_proto;
#if defined(CONFIG_NF_CONNTRACK_LABELS)
unsigned int labels_used;
u8 label_words;
#endif
#ifdef CONFIG_NF_NAT_NEEDED
struct hlist_head *nat_bysource;
unsigned int nat_htable_size;

2
include/uapi/linux/netfilter/Kbuild
View File

@ -35,9 +35,11 @@ header-y += xt_TCPOPTSTRIP.h
header-y += xt_TEE.h
header-y += xt_TPROXY.h
header-y += xt_addrtype.h
header-y += xt_bpf.h
header-y += xt_cluster.h
header-y += xt_comment.h
header-y += xt_connbytes.h
header-y += xt_connlabel.h
header-y += xt_connlimit.h
header-y += xt_connmark.h
header-y += xt_conntrack.h

1
include/uapi/linux/netfilter/nf_conntrack_common.h
View File

@ -101,6 +101,7 @@ enum ip_conntrack_events {
IPCT_MARK, /* new mark has been set */
IPCT_NATSEQADJ, /* NAT is doing sequence adjustment */
IPCT_SECMARK, /* new security mark has been set */
IPCT_LABEL, /* new connlabel has been set */
};
enum ip_conntrack_expect_events {

2
include/uapi/linux/netfilter/nfnetlink_conntrack.h
View File

@ -49,6 +49,8 @@ enum ctattr_type {
CTA_SECCTX,
CTA_TIMESTAMP,
CTA_MARK_MASK,
CTA_LABELS,
CTA_LABELS_MASK,
__CTA_MAX
};
#define CTA_MAX (__CTA_MAX - 1)

17
include/uapi/linux/netfilter/xt_bpf.h Normal file
View File

@ -0,0 +1,17 @@
#ifndef _XT_BPF_H
#define _XT_BPF_H
#include <linux/filter.h>
#include <linux/types.h>
#define XT_BPF_MAX_NUM_INSTR 64
struct xt_bpf_info {
__u16 bpf_program_num_elem;
struct sock_filter bpf_program[XT_BPF_MAX_NUM_INSTR];
/* only used in the kernel */
struct sk_filter *filter __attribute__((aligned(8)));
};
#endif /*_XT_BPF_H */

12
include/uapi/linux/netfilter/xt_connlabel.h Normal file
View File

@ -0,0 +1,12 @@
#include <linux/types.h>
#define XT_CONNLABEL_MAXBIT 127
enum xt_connlabel_mtopts {
XT_CONNLABEL_OP_INVERT = 1 << 0,
XT_CONNLABEL_OP_SET = 1 << 1,
};
struct xt_connlabel_mtinfo {
__u16 bit;
__u16 options;
};

82
net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
View File

@ -420,54 +420,43 @@ static int ipv4_net_init(struct net *net)
{
int ret = 0;
ret = nf_conntrack_l4proto_register(net,
&nf_conntrack_l4proto_tcp4);
ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_tcp4);
if (ret < 0) {
pr_err("nf_conntrack_l4proto_tcp4 :protocol register failed\n");
pr_err("nf_conntrack_tcp4: pernet registration failed\n");
goto out_tcp;
}
ret = nf_conntrack_l4proto_register(net,
&nf_conntrack_l4proto_udp4);
ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_udp4);
if (ret < 0) {
pr_err("nf_conntrack_l4proto_udp4 :protocol register failed\n");
pr_err("nf_conntrack_udp4: pernet registration failed\n");
goto out_udp;
}
ret = nf_conntrack_l4proto_register(net,
&nf_conntrack_l4proto_icmp);
ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_icmp);
if (ret < 0) {
pr_err("nf_conntrack_l4proto_icmp4 :protocol register failed\n");
pr_err("nf_conntrack_icmp4: pernet registration failed\n");
goto out_icmp;
}
ret = nf_conntrack_l3proto_register(net,
&nf_conntrack_l3proto_ipv4);
ret = nf_ct_l3proto_pernet_register(net, &nf_conntrack_l3proto_ipv4);
if (ret < 0) {
pr_err("nf_conntrack_l3proto_ipv4 :protocol register failed\n");
pr_err("nf_conntrack_ipv4: pernet registration failed\n");
goto out_ipv4;
}
return 0;
out_ipv4:
nf_conntrack_l4proto_unregister(net,
&nf_conntrack_l4proto_icmp);
nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_icmp);
out_icmp:
nf_conntrack_l4proto_unregister(net,
&nf_conntrack_l4proto_udp4);
nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_udp4);
out_udp:
nf_conntrack_l4proto_unregister(net,
&nf_conntrack_l4proto_tcp4);
nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_tcp4);
out_tcp:
return ret;
}
static void ipv4_net_exit(struct net *net)
{
nf_conntrack_l3proto_unregister(net,
&nf_conntrack_l3proto_ipv4);
nf_conntrack_l4proto_unregister(net,
&nf_conntrack_l4proto_icmp);
nf_conntrack_l4proto_unregister(net,
&nf_conntrack_l4proto_udp4);
nf_conntrack_l4proto_unregister(net,
&nf_conntrack_l4proto_tcp4);
nf_ct_l3proto_pernet_unregister(net, &nf_conntrack_l3proto_ipv4);
nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_icmp);
nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_udp4);
nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_tcp4);
}
static struct pernet_operations ipv4_net_ops = {
@ -500,16 +489,49 @@ static int __init nf_conntrack_l3proto_ipv4_init(void)
pr_err("nf_conntrack_ipv4: can't register hooks.\n");
goto cleanup_pernet;
}
ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_tcp4);
if (ret < 0) {
pr_err("nf_conntrack_ipv4: can't register tcp4 proto.\n");
goto cleanup_hooks;
}
ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_udp4);
if (ret < 0) {
pr_err("nf_conntrack_ipv4: can't register udp4 proto.\n");
goto cleanup_tcp4;
}
ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_icmp);
if (ret < 0) {
pr_err("nf_conntrack_ipv4: can't register icmpv4 proto.\n");
goto cleanup_udp4;
}
ret = nf_ct_l3proto_register(&nf_conntrack_l3proto_ipv4);
if (ret < 0) {
pr_err("nf_conntrack_ipv4: can't register ipv4 proto.\n");
goto cleanup_icmpv4;
}
#if defined(CONFIG_PROC_FS) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT)
ret = nf_conntrack_ipv4_compat_init();
if (ret < 0)
goto cleanup_hooks;
goto cleanup_proto;
#endif
return ret;
#if defined(CONFIG_PROC_FS) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT)
cleanup_proto:
nf_ct_l3proto_unregister(&nf_conntrack_l3proto_ipv4);
#endif
cleanup_icmpv4:
nf_ct_l4proto_unregister(&nf_conntrack_l4proto_icmp);
cleanup_udp4:
nf_ct_l4proto_unregister(&nf_conntrack_l4proto_udp4);
cleanup_tcp4:
nf_ct_l4proto_unregister(&nf_conntrack_l4proto_tcp4);
cleanup_hooks:
nf_unregister_hooks(ipv4_conntrack_ops, ARRAY_SIZE(ipv4_conntrack_ops));
#endif
cleanup_pernet:
unregister_pernet_subsys(&ipv4_net_ops);
cleanup_sockopt:
@ -523,6 +545,10 @@ static void __exit nf_conntrack_l3proto_ipv4_fini(void)
#if defined(CONFIG_PROC_FS) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT)
nf_conntrack_ipv4_compat_fini();
#endif
nf_ct_l3proto_unregister(&nf_conntrack_l3proto_ipv4);
nf_ct_l4proto_unregister(&nf_conntrack_l4proto_icmp);
nf_ct_l4proto_unregister(&nf_conntrack_l4proto_udp4);
nf_ct_l4proto_unregister(&nf_conntrack_l4proto_tcp4);
nf_unregister_hooks(ipv4_conntrack_ops, ARRAY_SIZE(ipv4_conntrack_ops));
unregister_pernet_subsys(&ipv4_net_ops);
nf_unregister_sockopt(&so_getorigdst);

86
net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
View File

@ -421,54 +421,43 @@ static int ipv6_net_init(struct net *net)
{
int ret = 0;
ret = nf_conntrack_l4proto_register(net,
&nf_conntrack_l4proto_tcp6);
ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_tcp6);
if (ret < 0) {
printk(KERN_ERR "nf_conntrack_l4proto_tcp6: protocol register failed\n");
pr_err("nf_conntrack_tcp6: pernet registration failed\n");
goto out;
}
ret = nf_conntrack_l4proto_register(net,
&nf_conntrack_l4proto_udp6);
ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_udp6);
if (ret < 0) {
printk(KERN_ERR "nf_conntrack_l4proto_udp6: protocol register failed\n");
pr_err("nf_conntrack_udp6: pernet registration failed\n");
goto cleanup_tcp6;
}
ret = nf_conntrack_l4proto_register(net,
&nf_conntrack_l4proto_icmpv6);
ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_icmpv6);
if (ret < 0) {
printk(KERN_ERR "nf_conntrack_l4proto_icmp6: protocol register failed\n");
pr_err("nf_conntrack_icmp6: pernet registration failed\n");
goto cleanup_udp6;
}
ret = nf_conntrack_l3proto_register(net,
&nf_conntrack_l3proto_ipv6);
ret = nf_ct_l3proto_pernet_register(net, &nf_conntrack_l3proto_ipv6);
if (ret < 0) {
printk(KERN_ERR "nf_conntrack_l3proto_ipv6: protocol register failed\n");
pr_err("nf_conntrack_ipv6: pernet registration failed.\n");
goto cleanup_icmpv6;
}
return 0;
cleanup_icmpv6:
nf_conntrack_l4proto_unregister(net,
&nf_conntrack_l4proto_icmpv6);
nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_icmpv6);
cleanup_udp6:
nf_conntrack_l4proto_unregister(net,
&nf_conntrack_l4proto_udp6);
nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_udp6);
cleanup_tcp6:
nf_conntrack_l4proto_unregister(net,
&nf_conntrack_l4proto_tcp6);
nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_tcp6);
out:
return ret;
}
static void ipv6_net_exit(struct net *net)
{
nf_conntrack_l3proto_unregister(net,
&nf_conntrack_l3proto_ipv6);
nf_conntrack_l4proto_unregister(net,
&nf_conntrack_l4proto_icmpv6);
nf_conntrack_l4proto_unregister(net,
&nf_conntrack_l4proto_udp6);
nf_conntrack_l4proto_unregister(net,
&nf_conntrack_l4proto_tcp6);
nf_ct_l3proto_pernet_unregister(net, &nf_conntrack_l3proto_ipv6);
nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_icmpv6);
nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_udp6);
nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_tcp6);
}
static struct pernet_operations ipv6_net_ops = {
@ -491,19 +480,52 @@ static int __init nf_conntrack_l3proto_ipv6_init(void)
ret = register_pernet_subsys(&ipv6_net_ops);
if (ret < 0)
goto cleanup_pernet;
goto cleanup_sockopt;
ret = nf_register_hooks(ipv6_conntrack_ops,
ARRAY_SIZE(ipv6_conntrack_ops));
if (ret < 0) {
pr_err("nf_conntrack_ipv6: can't register pre-routing defrag "
"hook.\n");
goto cleanup_ipv6;
goto cleanup_pernet;
}
ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_tcp6);
if (ret < 0) {
pr_err("nf_conntrack_ipv6: can't register tcp6 proto.\n");
goto cleanup_hooks;
}
ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_udp6);
if (ret < 0) {
pr_err("nf_conntrack_ipv6: can't register udp6 proto.\n");
goto cleanup_tcp6;
}
ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_icmpv6);
if (ret < 0) {
pr_err("nf_conntrack_ipv6: can't register icmpv6 proto.\n");
goto cleanup_udp6;
}
ret = nf_ct_l3proto_register(&nf_conntrack_l3proto_ipv6);
if (ret < 0) {
pr_err("nf_conntrack_ipv6: can't register ipv6 proto.\n");
goto cleanup_icmpv6;
}
return ret;
cleanup_ipv6:
unregister_pernet_subsys(&ipv6_net_ops);
cleanup_icmpv6:
nf_ct_l4proto_unregister(&nf_conntrack_l4proto_icmpv6);
cleanup_udp6:
nf_ct_l4proto_unregister(&nf_conntrack_l4proto_udp6);
cleanup_tcp6:
nf_ct_l4proto_unregister(&nf_conntrack_l4proto_tcp6);
cleanup_hooks:
nf_unregister_hooks(ipv6_conntrack_ops, ARRAY_SIZE(ipv6_conntrack_ops));
cleanup_pernet:
unregister_pernet_subsys(&ipv6_net_ops);
cleanup_sockopt:
nf_unregister_sockopt(&so_getorigdst6);
return ret;
}
@ -511,6 +533,10 @@ static int __init nf_conntrack_l3proto_ipv6_init(void)
static void __exit nf_conntrack_l3proto_ipv6_fini(void)
{
synchronize_net();
nf_ct_l3proto_unregister(&nf_conntrack_l3proto_ipv6);
nf_ct_l4proto_unregister(&nf_conntrack_l4proto_tcp6);
nf_ct_l4proto_unregister(&nf_conntrack_l4proto_udp6);
nf_ct_l4proto_unregister(&nf_conntrack_l4proto_icmpv6);
nf_unregister_hooks(ipv6_conntrack_ops, ARRAY_SIZE(ipv6_conntrack_ops));
unregister_pernet_subsys(&ipv6_net_ops);
nf_unregister_sockopt(&so_getorigdst6);

27
net/netfilter/Kconfig
View File

@ -124,6 +124,12 @@ config NF_CONNTRACK_TIMESTAMP
If unsure, say `N'.
config NF_CONNTRACK_LABELS
bool
help
This option enables support for assigning user-defined flag bits
to connection tracking entries. It selected by the connlabel match.
config NF_CT_PROTO_DCCP
tristate 'DCCP protocol connection tracking support (EXPERIMENTAL)'
depends on EXPERIMENTAL
@ -805,6 +811,15 @@ config NETFILTER_XT_MATCH_ADDRTYPE
If you want to compile it as a module, say M here and read
<file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
config NETFILTER_XT_MATCH_BPF
tristate '"bpf" match support'
depends on NETFILTER_ADVANCED
help
BPF matching applies a linux socket filter to each packet and
accepts those for which the filter returns non-zero.
To compile it as a module, choose M here. If unsure, say N.
config NETFILTER_XT_MATCH_CLUSTER
tristate '"cluster" match support'
depends on NF_CONNTRACK
@ -842,6 +857,18 @@ config NETFILTER_XT_MATCH_CONNBYTES
If you want to compile it as a module, say M here and read
<file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
config NETFILTER_XT_MATCH_CONNLABEL
tristate '"connlabel" match support'
select NF_CONNTRACK_LABELS
depends on NETFILTER_ADVANCED
---help---
This match allows you to test and assign userspace-defined labels names
to a connection. The kernel only stores bit values - mapping
names to bits is done by userspace.
Unlike connmark, more than 32 flag bits may be assigned to a
connection simultaneously.
config NETFILTER_XT_MATCH_CONNLIMIT
tristate '"connlimit" match support"'
depends on NF_CONNTRACK

3
net/netfilter/Makefile
View File

@ -4,6 +4,7 @@ nf_conntrack-y := nf_conntrack_core.o nf_conntrack_standalone.o nf_conntrack_exp
nf_conntrack-$(CONFIG_NF_CONNTRACK_TIMEOUT) += nf_conntrack_timeout.o
nf_conntrack-$(CONFIG_NF_CONNTRACK_TIMESTAMP) += nf_conntrack_timestamp.o
nf_conntrack-$(CONFIG_NF_CONNTRACK_EVENTS) += nf_conntrack_ecache.o
nf_conntrack-$(CONFIG_NF_CONNTRACK_LABELS) += nf_conntrack_labels.o
obj-$(CONFIG_NETFILTER) = netfilter.o
@ -98,9 +99,11 @@ obj-$(CONFIG_NETFILTER_XT_TARGET_IDLETIMER) += xt_IDLETIMER.o
# matches
obj-$(CONFIG_NETFILTER_XT_MATCH_ADDRTYPE) += xt_addrtype.o
obj-$(CONFIG_NETFILTER_XT_MATCH_BPF) += xt_bpf.o
obj-$(CONFIG_NETFILTER_XT_MATCH_CLUSTER) += xt_cluster.o
obj-$(CONFIG_NETFILTER_XT_MATCH_COMMENT) += xt_comment.o
obj-$(CONFIG_NETFILTER_XT_MATCH_CONNBYTES) += xt_connbytes.o
obj-$(CONFIG_NETFILTER_XT_MATCH_CONNLABEL) += xt_connlabel.o
obj-$(CONFIG_NETFILTER_XT_MATCH_CONNLIMIT) += xt_connlimit.o
obj-$(CONFIG_NETFILTER_XT_MATCH_CONNTRACK) += xt_conntrack.o
obj-$(CONFIG_NETFILTER_XT_MATCH_CPU) += xt_cpu.o

36
net/netfilter/nf_conntrack_acct.c
View File

@ -106,36 +106,26 @@ static void nf_conntrack_acct_fini_sysctl(struct net *net)
}
#endif
int nf_conntrack_acct_init(struct net *net)
int nf_conntrack_acct_pernet_init(struct net *net)
{
int ret;
net->ct.sysctl_acct = nf_ct_acct;
return nf_conntrack_acct_init_sysctl(net);
}
if (net_eq(net, &init_net)) {
ret = nf_ct_extend_register(&acct_extend);
if (ret < 0) {
printk(KERN_ERR "nf_conntrack_acct: Unable to register extension\n");
goto out_extend_register;
}
}
void nf_conntrack_acct_pernet_fini(struct net *net)
{
nf_conntrack_acct_fini_sysctl(net);
}
ret = nf_conntrack_acct_init_sysctl(net);
int nf_conntrack_acct_init(void)
{
int ret = nf_ct_extend_register(&acct_extend);
if (ret < 0)
goto out_sysctl;
return 0;
out_sysctl:
if (net_eq(net, &init_net))
nf_ct_extend_unregister(&acct_extend);
out_extend_register:
pr_err("nf_conntrack_acct: Unable to register extension\n");
return ret;
}
void nf_conntrack_acct_fini(struct net *net)
void nf_conntrack_acct_fini(void)
{
nf_conntrack_acct_fini_sysctl(net);
if (net_eq(net, &init_net))
nf_ct_extend_unregister(&acct_extend);
nf_ct_extend_unregister(&acct_extend);
}

191
net/netfilter/nf_conntrack_core.c
View File

@ -45,6 +45,7 @@
#include <net/netfilter/nf_conntrack_zones.h>
#include <net/netfilter/nf_conntrack_timestamp.h>
#include <net/netfilter/nf_conntrack_timeout.h>
#include <net/netfilter/nf_conntrack_labels.h>
#include <net/netfilter/nf_nat.h>
#include <net/netfilter/nf_nat_core.h>
@ -763,6 +764,7 @@ void nf_conntrack_free(struct nf_conn *ct)
}
EXPORT_SYMBOL_GPL(nf_conntrack_free);
/* Allocate a new conntrack: we return -ENOMEM if classification
failed due to stress. Otherwise it really is unclassifiable. */
static struct nf_conntrack_tuple_hash *
@ -809,6 +811,7 @@ init_conntrack(struct net *net, struct nf_conn *tmpl,
nf_ct_acct_ext_add(ct, GFP_ATOMIC);
nf_ct_tstamp_ext_add(ct, GFP_ATOMIC);
nf_ct_labels_ext_add(ct);
ecache = tmpl ? nf_ct_ecache_find(tmpl) : NULL;
nf_ct_ecache_ext_add(ct, ecache ? ecache->ctmask : 0,
@ -1331,18 +1334,42 @@ static int untrack_refs(void)
return cnt;
}
static void nf_conntrack_cleanup_init_net(void)
void nf_conntrack_cleanup_start(void)
{
RCU_INIT_POINTER(ip_ct_attach, NULL);
}
void nf_conntrack_cleanup_end(void)
{
RCU_INIT_POINTER(nf_ct_destroy, NULL);
while (untrack_refs() > 0)
schedule();
#ifdef CONFIG_NF_CONNTRACK_ZONES
nf_ct_extend_unregister(&nf_ct_zone_extend);
#endif
nf_conntrack_proto_fini();
nf_conntrack_labels_fini();
nf_conntrack_helper_fini();
nf_conntrack_timeout_fini();
nf_conntrack_ecache_fini();
nf_conntrack_tstamp_fini();
nf_conntrack_acct_fini();
nf_conntrack_expect_fini();
}
static void nf_conntrack_cleanup_net(struct net *net)
/*
* Mishearing the voices in his head, our hero wonders how he's
* supposed to kill the mall.
*/
void nf_conntrack_cleanup_net(struct net *net)
{
/*
* This makes sure all current packets have passed through
* netfilter framework. Roll on, two-stage module
* delete...
*/
synchronize_net();
i_see_dead_people:
nf_ct_iterate_cleanup(net, kill_all, NULL);
nf_ct_release_dying_list(net);
@ -1352,38 +1379,17 @@ static void nf_conntrack_cleanup_net(struct net *net)
}
nf_ct_free_hashtable(net->ct.hash, net->ct.htable_size);
nf_conntrack_helper_fini(net);
nf_conntrack_timeout_fini(net);
nf_conntrack_ecache_fini(net);
nf_conntrack_tstamp_fini(net);
nf_conntrack_acct_fini(net);
nf_conntrack_expect_fini(net);
nf_conntrack_proto_pernet_fini(net);
nf_conntrack_helper_pernet_fini(net);
nf_conntrack_ecache_pernet_fini(net);
nf_conntrack_tstamp_pernet_fini(net);
nf_conntrack_acct_pernet_fini(net);
nf_conntrack_expect_pernet_fini(net);
kmem_cache_destroy(net->ct.nf_conntrack_cachep);
kfree(net->ct.slabname);
free_percpu(net->ct.stat);
}
/* Mishearing the voices in his head, our hero wonders how he's
supposed to kill the mall. */
void nf_conntrack_cleanup(struct net *net)
{
if (net_eq(net, &init_net))
RCU_INIT_POINTER(ip_ct_attach, NULL);
/* This makes sure all current packets have passed through
netfilter framework. Roll on, two-stage module
delete... */
synchronize_net();
nf_conntrack_proto_fini(net);
nf_conntrack_cleanup_net(net);
}
void nf_conntrack_cleanup_end(void)
{
RCU_INIT_POINTER(nf_ct_destroy, NULL);
nf_conntrack_cleanup_init_net();
}
void *nf_ct_alloc_hashtable(unsigned int *sizep, int nulls)
{
struct hlist_nulls_head *hash;
@ -1474,7 +1480,7 @@ void nf_ct_untracked_status_or(unsigned long bits)
}
EXPORT_SYMBOL_GPL(nf_ct_untracked_status_or);
static int nf_conntrack_init_init_net(void)
int nf_conntrack_init_start(void)
{
int max_factor = 8;
int ret, cpu;
@ -1501,11 +1507,44 @@ static int nf_conntrack_init_init_net(void)
printk(KERN_INFO "nf_conntrack version %s (%u buckets, %d max)\n",
NF_CONNTRACK_VERSION, nf_conntrack_htable_size,
nf_conntrack_max);
ret = nf_conntrack_expect_init();
if (ret < 0)
goto err_expect;
ret = nf_conntrack_acct_init();
if (ret < 0)
goto err_acct;
ret = nf_conntrack_tstamp_init();
if (ret < 0)
goto err_tstamp;
ret = nf_conntrack_ecache_init();
if (ret < 0)
goto err_ecache;
ret = nf_conntrack_timeout_init();
if (ret < 0)
goto err_timeout;
ret = nf_conntrack_helper_init();
if (ret < 0)
goto err_helper;
ret = nf_conntrack_labels_init();
if (ret < 0)
goto err_labels;
#ifdef CONFIG_NF_CONNTRACK_ZONES
ret = nf_ct_extend_register(&nf_ct_zone_extend);
if (ret < 0)
goto err_extend;
#endif
ret = nf_conntrack_proto_init();
if (ret < 0)
goto err_proto;
/* Set up fake conntrack: to never be deleted, not in any hashes */
for_each_possible_cpu(cpu) {
struct nf_conn *ct = &per_cpu(nf_conntrack_untracked, cpu);
@ -1516,12 +1555,38 @@ static int nf_conntrack_init_init_net(void)
nf_ct_untracked_status_or(IPS_CONFIRMED | IPS_UNTRACKED);
return 0;
err_proto:
#ifdef CONFIG_NF_CONNTRACK_ZONES
nf_ct_extend_unregister(&nf_ct_zone_extend);
err_extend:
#endif
nf_conntrack_labels_fini();
err_labels:
nf_conntrack_helper_fini();
err_helper:
nf_conntrack_timeout_fini();
err_timeout:
nf_conntrack_ecache_fini();
err_ecache:
nf_conntrack_tstamp_fini();
err_tstamp:
nf_conntrack_acct_fini();
err_acct:
nf_conntrack_expect_fini();
err_expect:
return ret;
}
void nf_conntrack_init_end(void)
{
/* For use by REJECT target */
RCU_INIT_POINTER(ip_ct_attach, nf_conntrack_attach);
RCU_INIT_POINTER(nf_ct_destroy, destroy_conntrack);
/* Howto get NAT offsets */
RCU_INIT_POINTER(nf_ct_nat_offset, NULL);
}
/*
* We need to use special "null" values, not used in hash table
*/
@ -1529,7 +1594,7 @@ err_extend:
#define DYING_NULLS_VAL ((1<<30)+1)
#define TEMPLATE_NULLS_VAL ((1<<30)+2)
static int nf_conntrack_init_net(struct net *net)
int nf_conntrack_init_net(struct net *net)
{
int ret;
@ -1565,35 +1630,36 @@ static int nf_conntrack_init_net(struct net *net)
printk(KERN_ERR "Unable to create nf_conntrack_hash\n");
goto err_hash;
}
ret = nf_conntrack_expect_init(net);
ret = nf_conntrack_expect_pernet_init(net);
if (ret < 0)
goto err_expect;
ret = nf_conntrack_acct_init(net);
ret = nf_conntrack_acct_pernet_init(net);
if (ret < 0)
goto err_acct;
ret = nf_conntrack_tstamp_init(net);
ret = nf_conntrack_tstamp_pernet_init(net);
if (ret < 0)
goto err_tstamp;
ret = nf_conntrack_ecache_init(net);
ret = nf_conntrack_ecache_pernet_init(net);
if (ret < 0)
goto err_ecache;
ret = nf_conntrack_timeout_init(net);
if (ret < 0)
goto err_timeout;
ret = nf_conntrack_helper_init(net);
ret = nf_conntrack_helper_pernet_init(net);
if (ret < 0)
goto err_helper;
ret = nf_conntrack_proto_pernet_init(net);
if (ret < 0)
goto err_proto;
return 0;
err_proto:
nf_conntrack_helper_pernet_fini(net);
err_helper:
nf_conntrack_timeout_fini(net);
err_timeout:
nf_conntrack_ecache_fini(net);
nf_conntrack_ecache_pernet_fini(net);
err_ecache:
nf_conntrack_tstamp_fini(net);
nf_conntrack_tstamp_pernet_fini(net);
err_tstamp:
nf_conntrack_acct_fini(net);
nf_conntrack_acct_pernet_fini(net);
err_acct:
nf_conntrack_expect_fini(net);
nf_conntrack_expect_pernet_fini(net);
err_expect:
nf_ct_free_hashtable(net->ct.hash, net->ct.htable_size);
err_hash:
@ -1610,38 +1676,3 @@ s16 (*nf_ct_nat_offset)(const struct nf_conn *ct,
enum ip_conntrack_dir dir,
u32 seq);
EXPORT_SYMBOL_GPL(nf_ct_nat_offset);
int nf_conntrack_init(struct net *net)
{
int ret;
if (net_eq(net, &init_net)) {
ret = nf_conntrack_init_init_net();
if (ret < 0)
goto out_init_net;
}
ret = nf_conntrack_proto_init(net);
if (ret < 0)
goto out_proto;
ret = nf_conntrack_init_net(net);
if (ret < 0)
goto out_net;
if (net_eq(net, &init_net)) {
/* For use by REJECT target */
RCU_INIT_POINTER(ip_ct_attach, nf_conntrack_attach);
RCU_INIT_POINTER(nf_ct_destroy, destroy_conntrack);
/* Howto get NAT offsets */
RCU_INIT_POINTER(nf_ct_nat_offset, NULL);
}
return 0;
out_net:
nf_conntrack_proto_fini(net);
out_proto:
if (net_eq(net, &init_net))
nf_conntrack_cleanup_init_net();
out_init_net:
return ret;
}

37
net/netfilter/nf_conntrack_ecache.c
View File

@ -233,38 +233,27 @@ static void nf_conntrack_event_fini_sysctl(struct net *net)
}
#endif /* CONFIG_SYSCTL */
int nf_conntrack_ecache_init(struct net *net)
int nf_conntrack_ecache_pernet_init(struct net *net)
{
int ret;
net->ct.sysctl_events = nf_ct_events;
net->ct.sysctl_events_retry_timeout = nf_ct_events_retry_timeout;
return nf_conntrack_event_init_sysctl(net);
}
if (net_eq(net, &init_net)) {
ret = nf_ct_extend_register(&event_extend);
if (ret < 0) {
printk(KERN_ERR "nf_ct_event: Unable to register "
"event extension.\n");
goto out_extend_register;
}
}
void nf_conntrack_ecache_pernet_fini(struct net *net)
{
nf_conntrack_event_fini_sysctl(net);
}
ret = nf_conntrack_event_init_sysctl(net);
int nf_conntrack_ecache_init(void)
{
int ret = nf_ct_extend_register(&event_extend);
if (ret < 0)
goto out_sysctl;
return 0;
out_sysctl:
if (net_eq(net, &init_net))
nf_ct_extend_unregister(&event_extend);
out_extend_register:
pr_err("nf_ct_event: Unable to register event extension.\n");
return ret;
}
void nf_conntrack_ecache_fini(struct net *net)
void nf_conntrack_ecache_fini(void)
{
nf_conntrack_event_fini_sysctl(net);
if (net_eq(net, &init_net))
nf_ct_extend_unregister(&event_extend);
nf_ct_extend_unregister(&event_extend);
}

53
net/netfilter/nf_conntrack_expect.c
View File

@ -587,53 +587,50 @@ static void exp_proc_remove(struct net *net)
module_param_named(expect_hashsize, nf_ct_expect_hsize, uint, 0400);
int nf_conntrack_expect_init(struct net *net)
int nf_conntrack_expect_pernet_init(struct net *net)
{
int err = -ENOMEM;
if (net_eq(net, &init_net)) {
if (!nf_ct_expect_hsize) {
nf_ct_expect_hsize = net->ct.htable_size / 256;
if (!nf_ct_expect_hsize)
nf_ct_expect_hsize = 1;
}
nf_ct_expect_max = nf_ct_expect_hsize * 4;
}
net->ct.expect_count = 0;
net->ct.expect_hash = nf_ct_alloc_hashtable(&nf_ct_expect_hsize, 0);
if (net->ct.expect_hash == NULL)
goto err1;
if (net_eq(net, &init_net)) {
nf_ct_expect_cachep = kmem_cache_create("nf_conntrack_expect",
sizeof(struct nf_conntrack_expect),
0, 0, NULL);
if (!nf_ct_expect_cachep)
goto err2;
}
err = exp_proc_init(net);
if (err < 0)
goto err3;
goto err2;
return 0;
err3:
if (net_eq(net, &init_net))
kmem_cache_destroy(nf_ct_expect_cachep);
err2:
nf_ct_free_hashtable(net->ct.expect_hash, nf_ct_expect_hsize);
err1:
return err;
}
void nf_conntrack_expect_fini(struct net *net)
void nf_conntrack_expect_pernet_fini(struct net *net)
{
exp_proc_remove(net);
if (net_eq(net, &init_net)) {
rcu_barrier(); /* Wait for call_rcu() before destroy */
kmem_cache_destroy(nf_ct_expect_cachep);
}
nf_ct_free_hashtable(net->ct.expect_hash, nf_ct_expect_hsize);
}
int nf_conntrack_expect_init(void)
{
if (!nf_ct_expect_hsize) {
nf_ct_expect_hsize = nf_conntrack_htable_size / 256;
if (!nf_ct_expect_hsize)
nf_ct_expect_hsize = 1;
}
nf_ct_expect_max = nf_ct_expect_hsize * 4;
nf_ct_expect_cachep = kmem_cache_create("nf_conntrack_expect",
sizeof(struct nf_conntrack_expect),
0, 0, NULL);
if (!nf_ct_expect_cachep)
return -ENOMEM;
return 0;
}
void nf_conntrack_expect_fini(void)
{
rcu_barrier(); /* Wait for call_rcu() before destroy */
kmem_cache_destroy(nf_ct_expect_cachep);
}

63
net/netfilter/nf_conntrack_helper.c
View File

@ -423,44 +423,41 @@ static struct nf_ct_ext_type helper_extend __read_mostly = {
.id = NF_CT_EXT_HELPER,
};
int nf_conntrack_helper_init(struct net *net)
int nf_conntrack_helper_pernet_init(struct net *net)
{
int err;
net->ct.auto_assign_helper_warned = false;
net->ct.sysctl_auto_assign_helper = nf_ct_auto_assign_helper;
if (net_eq(net, &init_net)) {
nf_ct_helper_hsize = 1; /* gets rounded up to use one page */
nf_ct_helper_hash =
nf_ct_alloc_hashtable(&nf_ct_helper_hsize, 0);
if (!nf_ct_helper_hash)
return -ENOMEM;
err = nf_ct_extend_register(&helper_extend);
if (err < 0)
goto err1;
}
err = nf_conntrack_helper_init_sysctl(net);
if (err < 0)
goto out_sysctl;
return 0;
out_sysctl:
if (net_eq(net, &init_net))
nf_ct_extend_unregister(&helper_extend);
err1:
nf_ct_free_hashtable(nf_ct_helper_hash, nf_ct_helper_hsize);
return err;
return nf_conntrack_helper_init_sysctl(net);
}
void nf_conntrack_helper_fini(struct net *net)
void nf_conntrack_helper_pernet_fini(struct net *net)
{
nf_conntrack_helper_fini_sysctl(net);
if (net_eq(net, &init_net)) {
nf_ct_extend_unregister(&helper_extend);
nf_ct_free_hashtable(nf_ct_helper_hash, nf_ct_helper_hsize);
}
}
int nf_conntrack_helper_init(void)
{
int ret;
nf_ct_helper_hsize = 1; /* gets rounded up to use one page */
nf_ct_helper_hash =
nf_ct_alloc_hashtable(&nf_ct_helper_hsize, 0);
if (!nf_ct_helper_hash)
return -ENOMEM;
ret = nf_ct_extend_register(&helper_extend);
if (ret < 0) {
pr_err("nf_ct_helper: Unable to register helper extension.\n");
goto out_extend;
}
return 0;
out_extend:
nf_ct_free_hashtable(nf_ct_helper_hash, nf_ct_helper_hsize);
return ret;
}
void nf_conntrack_helper_fini(void)
{
nf_ct_extend_unregister(&helper_extend);
nf_ct_free_hashtable(nf_ct_helper_hash, nf_ct_helper_hsize);
}

112
net/netfilter/nf_conntrack_labels.c Normal file
View File

@ -0,0 +1,112 @@
/*
* test/set flag bits stored in conntrack extension area.
*
* (C) 2013 Astaro GmbH & Co KG
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/ctype.h>
#include <linux/export.h>
#include <linux/jhash.h>
#include <linux/spinlock.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <net/netfilter/nf_conntrack_ecache.h>
#include <net/netfilter/nf_conntrack_labels.h>
static unsigned int label_bits(const struct nf_conn_labels *l)
{
unsigned int longs = l->words;
return longs * BITS_PER_LONG;
}
bool nf_connlabel_match(const struct nf_conn *ct, u16 bit)
{
struct nf_conn_labels *labels = nf_ct_labels_find(ct);
if (!labels)
return false;
return bit < label_bits(labels) && test_bit(bit, labels->bits);
}
EXPORT_SYMBOL_GPL(nf_connlabel_match);
int nf_connlabel_set(struct nf_conn *ct, u16 bit)
{
struct nf_conn_labels *labels = nf_ct_labels_find(ct);
if (!labels || bit >= label_bits(labels))
return -ENOSPC;
if (test_bit(bit, labels->bits))
return 0;
if (test_and_set_bit(bit, labels->bits))
nf_conntrack_event_cache(IPCT_LABEL, ct);
return 0;
}
EXPORT_SYMBOL_GPL(nf_connlabel_set);
#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
static void replace_u32(u32 *address, u32 mask, u32 new)
{
u32 old, tmp;
do {
old = *address;
tmp = (old & mask) ^ new;
} while (cmpxchg(address, old, tmp) != old);
}
int nf_connlabels_replace(struct nf_conn *ct,
const u32 *data,
const u32 *mask, unsigned int words32)
{
struct nf_conn_labels *labels;
unsigned int size, i;
u32 *dst;
labels = nf_ct_labels_find(ct);
if (!labels)
return -ENOSPC;
size = labels->words * sizeof(long);
if (size < (words32 * sizeof(u32)))
words32 = size / sizeof(u32);
dst = (u32 *) labels->bits;
if (words32) {
for (i = 0; i < words32; i++)
replace_u32(&dst[i], mask ? ~mask[i] : 0, data[i]);
}
size /= sizeof(u32);
for (i = words32; i < size; i++) /* pad */
replace_u32(&dst[i], 0, 0);
nf_conntrack_event_cache(IPCT_LABEL, ct);
return 0;
}
EXPORT_SYMBOL_GPL(nf_connlabels_replace);
#endif
static struct nf_ct_ext_type labels_extend __read_mostly = {
.len = sizeof(struct nf_conn_labels),
.align = __alignof__(struct nf_conn_labels),
.id = NF_CT_EXT_LABELS,
};
int nf_conntrack_labels_init(void)
{
return nf_ct_extend_register(&labels_extend);
}
void nf_conntrack_labels_fini(void)
{
nf_ct_extend_unregister(&labels_extend);
}

88
net/netfilter/nf_conntrack_netlink.c
View File

@ -43,6 +43,7 @@
#include <net/netfilter/nf_conntrack_acct.h>
#include <net/netfilter/nf_conntrack_zones.h>
#include <net/netfilter/nf_conntrack_timestamp.h>
#include <net/netfilter/nf_conntrack_labels.h>
#ifdef CONFIG_NF_NAT_NEEDED
#include <net/netfilter/nf_nat_core.h>
#include <net/netfilter/nf_nat_l4proto.h>
@ -323,6 +324,40 @@ nla_put_failure:
#define ctnetlink_dump_secctx(a, b) (0)
#endif
#ifdef CONFIG_NF_CONNTRACK_LABELS
static int ctnetlink_label_size(const struct nf_conn *ct)
{
struct nf_conn_labels *labels = nf_ct_labels_find(ct);
if (!labels)
return 0;
return nla_total_size(labels->words * sizeof(long));
}
static int
ctnetlink_dump_labels(struct sk_buff *skb, const struct nf_conn *ct)
{
struct nf_conn_labels *labels = nf_ct_labels_find(ct);
unsigned int len, i;
if (!labels)
return 0;
len = labels->words * sizeof(long);
i = 0;
do {
if (labels->bits[i] != 0)
return nla_put(skb, CTA_LABELS, len, labels->bits);
i++;
} while (i < labels->words);
return 0;
}
#else
#define ctnetlink_dump_labels(a, b) (0)
#define ctnetlink_label_size(a) (0)
#endif
#define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple)
static inline int
@ -463,6 +498,7 @@ ctnetlink_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
ctnetlink_dump_helpinfo(skb, ct) < 0 ||
ctnetlink_dump_mark(skb, ct) < 0 ||
ctnetlink_dump_secctx(skb, ct) < 0 ||
ctnetlink_dump_labels(skb, ct) < 0 ||
ctnetlink_dump_id(skb, ct) < 0 ||
ctnetlink_dump_use(skb, ct) < 0 ||
ctnetlink_dump_master(skb, ct) < 0 ||
@ -561,6 +597,7 @@ ctnetlink_nlmsg_size(const struct nf_conn *ct)
+ nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */
#endif
+ ctnetlink_proto_size(ct)
+ ctnetlink_label_size(ct)
;
}
@ -662,6 +699,9 @@ ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item)
&& ctnetlink_dump_secctx(skb, ct) < 0)
goto nla_put_failure;
#endif
if (events & (1 << IPCT_LABEL) &&
ctnetlink_dump_labels(skb, ct) < 0)
goto nla_put_failure;
if (events & (1 << IPCT_RELATED) &&
ctnetlink_dump_master(skb, ct) < 0)
@ -921,6 +961,7 @@ ctnetlink_parse_help(const struct nlattr *attr, char **helper_name,
return 0;
}
#define __CTA_LABELS_MAX_LENGTH ((XT_CONNLABEL_MAXBIT + 1) / BITS_PER_BYTE)
static const struct nla_policy ct_nla_policy[CTA_MAX+1] = {
[CTA_TUPLE_ORIG] = { .type = NLA_NESTED },
[CTA_TUPLE_REPLY] = { .type = NLA_NESTED },
@ -937,6 +978,10 @@ static const struct nla_policy ct_nla_policy[CTA_MAX+1] = {
[CTA_NAT_SEQ_ADJ_REPLY] = { .type = NLA_NESTED },
[CTA_ZONE] = { .type = NLA_U16 },
[CTA_MARK_MASK] = { .type = NLA_U32 },
[CTA_LABELS] = { .type = NLA_BINARY,
.len = __CTA_LABELS_MAX_LENGTH },
[CTA_LABELS_MASK] = { .type = NLA_BINARY,
.len = __CTA_LABELS_MAX_LENGTH },
};
static int
@ -1464,6 +1509,31 @@ ctnetlink_change_nat_seq_adj(struct nf_conn *ct,
}
#endif
static int
ctnetlink_attach_labels(struct nf_conn *ct, const struct nlattr * const cda[])
{
#ifdef CONFIG_NF_CONNTRACK_LABELS
size_t len = nla_len(cda[CTA_LABELS]);
const void *mask = cda[CTA_LABELS_MASK];
if (len & (sizeof(u32)-1)) /* must be multiple of u32 */
return -EINVAL;
if (mask) {
if (nla_len(cda[CTA_LABELS_MASK]) == 0 ||
nla_len(cda[CTA_LABELS_MASK]) != len)
return -EINVAL;
mask = nla_data(cda[CTA_LABELS_MASK]);
}
len /= sizeof(u32);
return nf_connlabels_replace(ct, nla_data(cda[CTA_LABELS]), mask, len);
#else
return -EOPNOTSUPP;
#endif
}
static int
ctnetlink_change_conntrack(struct nf_conn *ct,
const struct nlattr * const cda[])
@ -1510,6 +1580,11 @@ ctnetlink_change_conntrack(struct nf_conn *ct,
return err;
}
#endif
if (cda[CTA_LABELS]) {
err = ctnetlink_attach_labels(ct, cda);
if (err < 0)
return err;
}
return 0;
}
@ -1598,6 +1673,8 @@ ctnetlink_create_conntrack(struct net *net, u16 zone,
nf_ct_acct_ext_add(ct, GFP_ATOMIC);
nf_ct_tstamp_ext_add(ct, GFP_ATOMIC);
nf_ct_ecache_ext_add(ct, 0, 0, GFP_ATOMIC);
nf_ct_labels_ext_add(ct);
/* we must add conntrack extensions before confirmation. */
ct->status |= IPS_CONFIRMED;
@ -1716,6 +1793,10 @@ ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb,
else
events = IPCT_NEW;
if (cda[CTA_LABELS] &&
ctnetlink_attach_labels(ct, cda) == 0)
events |= (1 << IPCT_LABEL);
nf_conntrack_eventmask_report((1 << IPCT_REPLY) |
(1 << IPCT_ASSURED) |
(1 << IPCT_HELPER) |
@ -1983,6 +2064,8 @@ ctnetlink_nfqueue_build(struct sk_buff *skb, struct nf_conn *ct)
if (ct->mark && ctnetlink_dump_mark(skb, ct) < 0)
goto nla_put_failure;
#endif
if (ctnetlink_dump_labels(skb, ct) < 0)
goto nla_put_failure;
rcu_read_unlock();
return 0;
@ -2011,6 +2094,11 @@ ctnetlink_nfqueue_parse_ct(const struct nlattr *cda[], struct nf_conn *ct)
if (err < 0)
return err;
}
if (cda[CTA_LABELS]) {
err = ctnetlink_attach_labels(ct, cda);
if (err < 0)
return err;
}
#if defined(CONFIG_NF_CONNTRACK_MARK)
if (cda[CTA_MARK])
ct->mark = ntohl(nla_get_be32(cda[CTA_MARK]));

92
net/netfilter/nf_conntrack_proto.c
View File

@ -212,8 +212,7 @@ static void nf_ct_l3proto_unregister_sysctl(struct net *net,
#endif
}
static int
nf_conntrack_l3proto_register_net(struct nf_conntrack_l3proto *proto)
int nf_ct_l3proto_register(struct nf_conntrack_l3proto *proto)
{
int ret = 0;
struct nf_conntrack_l3proto *old;
@ -242,8 +241,9 @@ out_unlock:
return ret;
}
EXPORT_SYMBOL_GPL(nf_ct_l3proto_register);
int nf_conntrack_l3proto_register(struct net *net,
int nf_ct_l3proto_pernet_register(struct net *net,
struct nf_conntrack_l3proto *proto)
{
int ret = 0;
@ -254,22 +254,11 @@ int nf_conntrack_l3proto_register(struct net *net,
return ret;
}
ret = nf_ct_l3proto_register_sysctl(net, proto);
if (ret < 0)
return ret;
if (net == &init_net) {
ret = nf_conntrack_l3proto_register_net(proto);
if (ret < 0)
nf_ct_l3proto_unregister_sysctl(net, proto);
}
return ret;
return nf_ct_l3proto_register_sysctl(net, proto);
}
EXPORT_SYMBOL_GPL(nf_conntrack_l3proto_register);
EXPORT_SYMBOL_GPL(nf_ct_l3proto_pernet_register);
static void
nf_conntrack_l3proto_unregister_net(struct nf_conntrack_l3proto *proto)
void nf_ct_l3proto_unregister(struct nf_conntrack_l3proto *proto)
{
BUG_ON(proto->l3proto >= AF_MAX);
@ -283,19 +272,17 @@ nf_conntrack_l3proto_unregister_net(struct nf_conntrack_l3proto *proto)
synchronize_rcu();
}
EXPORT_SYMBOL_GPL(nf_ct_l3proto_unregister);
void nf_conntrack_l3proto_unregister(struct net *net,
void nf_ct_l3proto_pernet_unregister(struct net *net,
struct nf_conntrack_l3proto *proto)
{
if (net == &init_net)
nf_conntrack_l3proto_unregister_net(proto);
nf_ct_l3proto_unregister_sysctl(net, proto);
/* Remove all contrack entries for this protocol */
nf_ct_iterate_cleanup(net, kill_l3proto, proto);
}
EXPORT_SYMBOL_GPL(nf_conntrack_l3proto_unregister);
EXPORT_SYMBOL_GPL(nf_ct_l3proto_pernet_unregister);
static struct nf_proto_net *nf_ct_l4proto_net(struct net *net,
struct nf_conntrack_l4proto *l4proto)
@ -376,8 +363,7 @@ void nf_ct_l4proto_unregister_sysctl(struct net *net,
/* FIXME: Allow NULL functions and sub in pointers to generic for
them. --RR */
static int
nf_conntrack_l4proto_register_net(struct nf_conntrack_l4proto *l4proto)
int nf_ct_l4proto_register(struct nf_conntrack_l4proto *l4proto)
{
int ret = 0;
@ -431,8 +417,9 @@ out_unlock:
mutex_unlock(&nf_ct_proto_mutex);
return ret;
}
EXPORT_SYMBOL_GPL(nf_ct_l4proto_register);
int nf_conntrack_l4proto_register(struct net *net,
int nf_ct_l4proto_pernet_register(struct net *net,
struct nf_conntrack_l4proto *l4proto)
{
int ret = 0;
@ -452,22 +439,13 @@ int nf_conntrack_l4proto_register(struct net *net,
if (ret < 0)
goto out;
if (net == &init_net) {
ret = nf_conntrack_l4proto_register_net(l4proto);
if (ret < 0) {
nf_ct_l4proto_unregister_sysctl(net, pn, l4proto);
goto out;
}
}
pn->users++;
out:
return ret;
}
EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_register);
EXPORT_SYMBOL_GPL(nf_ct_l4proto_pernet_register);
static void
nf_conntrack_l4proto_unregister_net(struct nf_conntrack_l4proto *l4proto)
void nf_ct_l4proto_unregister(struct nf_conntrack_l4proto *l4proto)
{
BUG_ON(l4proto->l3proto >= PF_MAX);
@ -482,15 +460,13 @@ nf_conntrack_l4proto_unregister_net(struct nf_conntrack_l4proto *l4proto)
synchronize_rcu();
}
EXPORT_SYMBOL_GPL(nf_ct_l4proto_unregister);
void nf_conntrack_l4proto_unregister(struct net *net,
void nf_ct_l4proto_pernet_unregister(struct net *net,
struct nf_conntrack_l4proto *l4proto)
{
struct nf_proto_net *pn = NULL;
if (net == &init_net)
nf_conntrack_l4proto_unregister_net(l4proto);
pn = nf_ct_l4proto_net(net, l4proto);
if (pn == NULL)
return;
@ -501,11 +477,10 @@ void nf_conntrack_l4proto_unregister(struct net *net,
/* Remove all contrack entries for this protocol */
nf_ct_iterate_cleanup(net, kill_l4proto, l4proto);
}
EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_unregister);
EXPORT_SYMBOL_GPL(nf_ct_l4proto_pernet_unregister);
int nf_conntrack_proto_init(struct net *net)
int nf_conntrack_proto_pernet_init(struct net *net)
{
unsigned int i;
int err;
struct nf_proto_net *pn = nf_ct_l4proto_net(net,
&nf_conntrack_l4proto_generic);
@ -520,19 +495,12 @@ int nf_conntrack_proto_init(struct net *net)
if (err < 0)
return err;
if (net == &init_net) {
for (i = 0; i < AF_MAX; i++)
rcu_assign_pointer(nf_ct_l3protos[i],
&nf_conntrack_l3proto_generic);
}
pn->users++;
return 0;
}
void nf_conntrack_proto_fini(struct net *net)
void nf_conntrack_proto_pernet_fini(struct net *net)
{
unsigned int i;
struct nf_proto_net *pn = nf_ct_l4proto_net(net,
&nf_conntrack_l4proto_generic);
@ -540,9 +508,21 @@ void nf_conntrack_proto_fini(struct net *net)
nf_ct_l4proto_unregister_sysctl(net,
pn,
&nf_conntrack_l4proto_generic);
if (net == &init_net) {
/* free l3proto protocol tables */
for (i = 0; i < PF_MAX; i++)
kfree(nf_ct_protos[i]);
}
}
int nf_conntrack_proto_init(void)
{
unsigned int i;
for (i = 0; i < AF_MAX; i++)
rcu_assign_pointer(nf_ct_l3protos[i],
&nf_conntrack_l3proto_generic);
return 0;
}
void nf_conntrack_proto_fini(void)
{
unsigned int i;
/* free l3proto protocol tables */
for (i = 0; i < PF_MAX; i++)
kfree(nf_ct_protos[i]);
}

43
net/netfilter/nf_conntrack_proto_dccp.c
View File

@ -935,32 +935,27 @@ static struct nf_conntrack_l4proto dccp_proto6 __read_mostly = {
static __net_init int dccp_net_init(struct net *net)
{
int ret = 0;
ret = nf_conntrack_l4proto_register(net,
&dccp_proto4);
ret = nf_ct_l4proto_pernet_register(net, &dccp_proto4);
if (ret < 0) {
pr_err("nf_conntrack_l4proto_dccp4 :protocol register failed.\n");
pr_err("nf_conntrack_dccp4: pernet registration failed.\n");
goto out;
}
ret = nf_conntrack_l4proto_register(net,
&dccp_proto6);
ret = nf_ct_l4proto_pernet_register(net, &dccp_proto6);
if (ret < 0) {
pr_err("nf_conntrack_l4proto_dccp6 :protocol register failed.\n");
pr_err("nf_conntrack_dccp6: pernet registration failed.\n");
goto cleanup_dccp4;
}
return 0;
cleanup_dccp4:
nf_conntrack_l4proto_unregister(net,
&dccp_proto4);
nf_ct_l4proto_pernet_unregister(net, &dccp_proto4);
out:
return ret;
}
static __net_exit void dccp_net_exit(struct net *net)
{
nf_conntrack_l4proto_unregister(net,
&dccp_proto6);
nf_conntrack_l4proto_unregister(net,
&dccp_proto4);
nf_ct_l4proto_pernet_unregister(net, &dccp_proto6);
nf_ct_l4proto_pernet_unregister(net, &dccp_proto4);
}
static struct pernet_operations dccp_net_ops = {
@ -972,11 +967,33 @@ static struct pernet_operations dccp_net_ops = {
static int __init nf_conntrack_proto_dccp_init(void)
{
return register_pernet_subsys(&dccp_net_ops);
int ret;
ret = nf_ct_l4proto_register(&dccp_proto4);
if (ret < 0)
goto out_dccp4;
ret = nf_ct_l4proto_register(&dccp_proto6);
if (ret < 0)
goto out_dccp6;
ret = register_pernet_subsys(&dccp_net_ops);
if (ret < 0)
goto out_pernet;
return 0;
out_pernet:
nf_ct_l4proto_unregister(&dccp_proto6);
out_dccp6:
nf_ct_l4proto_unregister(&dccp_proto4);
out_dccp4:
return ret;
}
static void __exit nf_conntrack_proto_dccp_fini(void)
{
nf_ct_l4proto_unregister(&dccp_proto6);
nf_ct_l4proto_unregister(&dccp_proto4);
unregister_pernet_subsys(&dccp_net_ops);
}

23
net/netfilter/nf_conntrack_proto_gre.c
View File

@ -397,15 +397,15 @@ static struct nf_conntrack_l4proto nf_conntrack_l4proto_gre4 __read_mostly = {
static int proto_gre_net_init(struct net *net)
{
int ret = 0;
ret = nf_conntrack_l4proto_register(net, &nf_conntrack_l4proto_gre4);
ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_gre4);
if (ret < 0)
pr_err("nf_conntrack_l4proto_gre4 :protocol register failed.\n");
pr_err("nf_conntrack_gre4: pernet registration failed.\n");
return ret;
}
static void proto_gre_net_exit(struct net *net)
{
nf_conntrack_l4proto_unregister(net, &nf_conntrack_l4proto_gre4);
nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_gre4);
nf_ct_gre_keymap_flush(net);
}
@ -418,11 +418,26 @@ static struct pernet_operations proto_gre_net_ops = {
static int __init nf_ct_proto_gre_init(void)
{
return register_pernet_subsys(&proto_gre_net_ops);
int ret;
ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_gre4);
if (ret < 0)
goto out_gre4;
ret = register_pernet_subsys(&proto_gre_net_ops);
if (ret < 0)
goto out_pernet;
return 0;
out_pernet:
nf_ct_l4proto_unregister(&nf_conntrack_l4proto_gre4);
out_gre4:
return ret;
}
static void __exit nf_ct_proto_gre_fini(void)
{
nf_ct_l4proto_unregister(&nf_conntrack_l4proto_gre4);
unregister_pernet_subsys(&proto_gre_net_ops);
}

43
net/netfilter/nf_conntrack_proto_sctp.c
View File

@ -853,33 +853,28 @@ static int sctp_net_init(struct net *net)
{
int ret = 0;
ret = nf_conntrack_l4proto_register(net,
&nf_conntrack_l4proto_sctp4);
ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_sctp4);
if (ret < 0) {
pr_err("nf_conntrack_l4proto_sctp4 :protocol register failed.\n");
pr_err("nf_conntrack_sctp4: pernet registration failed.\n");
goto out;
}
ret = nf_conntrack_l4proto_register(net,
&nf_conntrack_l4proto_sctp6);
ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_sctp6);
if (ret < 0) {
pr_err("nf_conntrack_l4proto_sctp6 :protocol register failed.\n");
pr_err("nf_conntrack_sctp6: pernet registration failed.\n");
goto cleanup_sctp4;
}
return 0;
cleanup_sctp4:
nf_conntrack_l4proto_unregister(net,
&nf_conntrack_l4proto_sctp4);
nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_sctp4);
out:
return ret;
}
static void sctp_net_exit(struct net *net)
{
nf_conntrack_l4proto_unregister(net,
&nf_conntrack_l4proto_sctp6);
nf_conntrack_l4proto_unregister(net,
&nf_conntrack_l4proto_sctp4);
nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_sctp6);
nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_sctp4);
}
static struct pernet_operations sctp_net_ops = {
@ -891,11 +886,33 @@ static struct pernet_operations sctp_net_ops = {
static int __init nf_conntrack_proto_sctp_init(void)
{
return register_pernet_subsys(&sctp_net_ops);
int ret;
ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_sctp4);
if (ret < 0)
goto out_sctp4;
ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_sctp6);
if (ret < 0)
goto out_sctp6;
ret = register_pernet_subsys(&sctp_net_ops);
if (ret < 0)
goto out_pernet;
return 0;
out_pernet:
nf_ct_l4proto_unregister(&nf_conntrack_l4proto_sctp6);
out_sctp6:
nf_ct_l4proto_unregister(&nf_conntrack_l4proto_sctp4);
out_sctp4:
return ret;
}
static void __exit nf_conntrack_proto_sctp_fini(void)
{
nf_ct_l4proto_unregister(&nf_conntrack_l4proto_sctp6);
nf_ct_l4proto_unregister(&nf_conntrack_l4proto_sctp4);
unregister_pernet_subsys(&sctp_net_ops);
}

40
net/netfilter/nf_conntrack_proto_udplite.c
View File

@ -336,30 +336,28 @@ static int udplite_net_init(struct net *net)
{
int ret = 0;
ret = nf_conntrack_l4proto_register(net,
&nf_conntrack_l4proto_udplite4);
ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_udplite4);
if (ret < 0) {
pr_err("nf_conntrack_l4proto_udplite4 :protocol register failed.\n");
pr_err("nf_conntrack_udplite4: pernet registration failed.\n");
goto out;
}
ret = nf_conntrack_l4proto_register(net,
&nf_conntrack_l4proto_udplite6);
ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_udplite6);
if (ret < 0) {
pr_err("nf_conntrack_l4proto_udplite4 :protocol register failed.\n");
pr_err("nf_conntrack_udplite6: pernet registration failed.\n");
goto cleanup_udplite4;
}
return 0;
cleanup_udplite4:
nf_conntrack_l4proto_unregister(net, &nf_conntrack_l4proto_udplite4);
nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_udplite4);
out:
return ret;
}
static void udplite_net_exit(struct net *net)
{
nf_conntrack_l4proto_unregister(net, &nf_conntrack_l4proto_udplite6);
nf_conntrack_l4proto_unregister(net, &nf_conntrack_l4proto_udplite4);
nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_udplite6);
nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_udplite4);
}
static struct pernet_operations udplite_net_ops = {
@ -371,11 +369,33 @@ static struct pernet_operations udplite_net_ops = {
static int __init nf_conntrack_proto_udplite_init(void)
{
return register_pernet_subsys(&udplite_net_ops);
int ret;
ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_udplite4);
if (ret < 0)
goto out_udplite4;
ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_udplite6);
if (ret < 0)
goto out_udplite6;
ret = register_pernet_subsys(&udplite_net_ops);
if (ret < 0)
goto out_pernet;
return 0;
out_pernet:
nf_ct_l4proto_unregister(&nf_conntrack_l4proto_udplite6);
out_udplite6:
nf_ct_l4proto_unregister(&nf_conntrack_l4proto_udplite4);
out_udplite4:
return ret;
}
static void __exit nf_conntrack_proto_udplite_exit(void)
{
nf_ct_l4proto_unregister(&nf_conntrack_l4proto_udplite6);
nf_ct_l4proto_unregister(&nf_conntrack_l4proto_udplite4);
unregister_pernet_subsys(&udplite_net_ops);
}

17
net/netfilter/nf_conntrack_sip.c
View File

@ -1440,8 +1440,25 @@ static int process_sip_request(struct sk_buff *skb, unsigned int protoff,
{
enum ip_conntrack_info ctinfo;
struct nf_conn *ct = nf_ct_get(skb, &ctinfo);
struct nf_ct_sip_master *ct_sip_info = nfct_help_data(ct);
enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
unsigned int matchoff, matchlen;
unsigned int cseq, i;
union nf_inet_addr addr;
__be16 port;
/* Many Cisco IP phones use a high source port for SIP requests, but
* listen for the response on port 5060. If we are the local
* router for one of these phones, save the port number from the
* Via: header so that nf_nat_sip can redirect the responses to
* the correct port.
*/
if (ct_sip_parse_header_uri(ct, *dptr, NULL, *datalen,
SIP_HDR_VIA_UDP, NULL, &matchoff,
&matchlen, &addr, &port) > 0 &&
port != ct->tuplehash[dir].tuple.src.u.udp.port &&
nf_inet_addr_cmp(&addr, &ct->tuplehash[dir].tuple.src.u3))
ct_sip_info->forced_dport = port;
for (i = 0; i < ARRAY_SIZE(sip_handlers); i++) {
const struct sip_handler *handler;

1
net/netfilter/nf_conntrack_snmp.c
View File

@ -16,6 +16,7 @@
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_expect.h>
#include <linux/netfilter/nf_conntrack_snmp.h>
#define SNMP_PORT 161

63
net/netfilter/nf_conntrack_standalone.c
View File

@ -472,13 +472,6 @@ static int nf_conntrack_standalone_init_sysctl(struct net *net)
{
struct ctl_table *table;
if (net_eq(net, &init_net)) {
nf_ct_netfilter_header =
register_net_sysctl(&init_net, "net", nf_ct_netfilter_table);
if (!nf_ct_netfilter_header)
goto out;
}
table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table),
GFP_KERNEL);
if (!table)
@ -502,10 +495,6 @@ static int nf_conntrack_standalone_init_sysctl(struct net *net)
out_unregister_netfilter:
kfree(table);
out_kmemdup:
if (net_eq(net, &init_net))
unregister_net_sysctl_table(nf_ct_netfilter_header);
out:
printk(KERN_ERR "nf_conntrack: can't register to sysctl.\n");
return -ENOMEM;
}
@ -513,8 +502,6 @@ static void nf_conntrack_standalone_fini_sysctl(struct net *net)
{
struct ctl_table *table;
if (net_eq(net, &init_net))
unregister_net_sysctl_table(nf_ct_netfilter_header);
table = net->ct.sysctl_header->ctl_table_arg;
unregister_net_sysctl_table(net->ct.sysctl_header);
kfree(table);
@ -530,51 +517,85 @@ static void nf_conntrack_standalone_fini_sysctl(struct net *net)
}
#endif /* CONFIG_SYSCTL */
static int nf_conntrack_net_init(struct net *net)
static int nf_conntrack_pernet_init(struct net *net)
{
int ret;
ret = nf_conntrack_init(net);
ret = nf_conntrack_init_net(net);
if (ret < 0)
goto out_init;
ret = nf_conntrack_standalone_init_proc(net);
if (ret < 0)
goto out_proc;
net->ct.sysctl_checksum = 1;
net->ct.sysctl_log_invalid = 0;
ret = nf_conntrack_standalone_init_sysctl(net);
if (ret < 0)
goto out_sysctl;
return 0;
out_sysctl:
nf_conntrack_standalone_fini_proc(net);
out_proc:
nf_conntrack_cleanup(net);
nf_conntrack_cleanup_net(net);
out_init:
return ret;
}
static void nf_conntrack_net_exit(struct net *net)
static void nf_conntrack_pernet_exit(struct net *net)
{
nf_conntrack_standalone_fini_sysctl(net);
nf_conntrack_standalone_fini_proc(net);
nf_conntrack_cleanup(net);
nf_conntrack_cleanup_net(net);
}
static struct pernet_operations nf_conntrack_net_ops = {
.init = nf_conntrack_net_init,
.exit = nf_conntrack_net_exit,
.init = nf_conntrack_pernet_init,
.exit = nf_conntrack_pernet_exit,
};
static int __init nf_conntrack_standalone_init(void)
{
return register_pernet_subsys(&nf_conntrack_net_ops);
int ret = nf_conntrack_init_start();
if (ret < 0)
goto out_start;
#ifdef CONFIG_SYSCTL
nf_ct_netfilter_header =
register_net_sysctl(&init_net, "net", nf_ct_netfilter_table);
if (!nf_ct_netfilter_header) {
pr_err("nf_conntrack: can't register to sysctl.\n");
goto out_sysctl;
}
#endif
ret = register_pernet_subsys(&nf_conntrack_net_ops);
if (ret < 0)
goto out_pernet;
nf_conntrack_init_end();
return 0;
out_pernet:
#ifdef CONFIG_SYSCTL
unregister_net_sysctl_table(nf_ct_netfilter_header);
out_sysctl:
#endif
nf_conntrack_cleanup_end();
out_start:
return ret;
}
static void __exit nf_conntrack_standalone_fini(void)
{
nf_conntrack_cleanup_start();
unregister_pernet_subsys(&nf_conntrack_net_ops);
#ifdef CONFIG_SYSCTL
unregister_net_sysctl_table(nf_ct_netfilter_header);
#endif
nf_conntrack_cleanup_end();
}

23
net/netfilter/nf_conntrack_timeout.c
View File

@ -37,24 +37,15 @@ static struct nf_ct_ext_type timeout_extend __read_mostly = {
.id = NF_CT_EXT_TIMEOUT,
};
int nf_conntrack_timeout_init(struct net *net)
int nf_conntrack_timeout_init(void)
{
int ret = 0;
if (net_eq(net, &init_net)) {
ret = nf_ct_extend_register(&timeout_extend);
if (ret < 0) {
printk(KERN_ERR "nf_ct_timeout: Unable to register "
"timeout extension.\n");
return ret;
}
}
return 0;
int ret = nf_ct_extend_register(&timeout_extend);
if (ret < 0)
pr_err("nf_ct_timeout: Unable to register timeout extension.\n");
return ret;
}
void nf_conntrack_timeout_fini(struct net *net)
void nf_conntrack_timeout_fini(void)
{
if (net_eq(net, &init_net))
nf_ct_extend_unregister(&timeout_extend);
nf_ct_extend_unregister(&timeout_extend);
}

43
net/netfilter/nf_conntrack_timestamp.c
View File

@ -88,37 +88,28 @@ static void nf_conntrack_tstamp_fini_sysctl(struct net *net)
}
#endif
int nf_conntrack_tstamp_init(struct net *net)
int nf_conntrack_tstamp_pernet_init(struct net *net)
{
net->ct.sysctl_tstamp = nf_ct_tstamp;
return nf_conntrack_tstamp_init_sysctl(net);
}
void nf_conntrack_tstamp_pernet_fini(struct net *net)
{
nf_conntrack_tstamp_fini_sysctl(net);
nf_ct_extend_unregister(&tstamp_extend);
}
int nf_conntrack_tstamp_init(void)
{
int ret;
net->ct.sysctl_tstamp = nf_ct_tstamp;
if (net_eq(net, &init_net)) {
ret = nf_ct_extend_register(&tstamp_extend);
if (ret < 0) {
printk(KERN_ERR "nf_ct_tstamp: Unable to register "
"extension\n");
goto out_extend_register;
}
}
ret = nf_conntrack_tstamp_init_sysctl(net);
ret = nf_ct_extend_register(&tstamp_extend);
if (ret < 0)
goto out_sysctl;
return 0;
out_sysctl:
if (net_eq(net, &init_net))
nf_ct_extend_unregister(&tstamp_extend);
out_extend_register:
pr_err("nf_ct_tstamp: Unable to register extension\n");
return ret;
}
void nf_conntrack_tstamp_fini(struct net *net)
void nf_conntrack_tstamp_fini(void)
{
nf_conntrack_tstamp_fini_sysctl(net);
if (net_eq(net, &init_net))
nf_ct_extend_unregister(&tstamp_extend);
nf_ct_extend_unregister(&tstamp_extend);
}

27
net/netfilter/nf_nat_sip.c
View File

@ -95,6 +95,7 @@ static int map_addr(struct sk_buff *skb, unsigned int protoff,
enum ip_conntrack_info ctinfo;
struct nf_conn *ct = nf_ct_get(skb, &ctinfo);
enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
struct nf_ct_sip_master *ct_sip_info = nfct_help_data(ct);
char buffer[INET6_ADDRSTRLEN + sizeof("[]:nnnnn")];
unsigned int buflen;
union nf_inet_addr newaddr;
@ -107,7 +108,8 @@ static int map_addr(struct sk_buff *skb, unsigned int protoff,
} else if (nf_inet_addr_cmp(&ct->tuplehash[dir].tuple.dst.u3, addr) &&
ct->tuplehash[dir].tuple.dst.u.udp.port == port) {
newaddr = ct->tuplehash[!dir].tuple.src.u3;
newport = ct->tuplehash[!dir].tuple.src.u.udp.port;
newport = ct_sip_info->forced_dport ? :
ct->tuplehash[!dir].tuple.src.u.udp.port;
} else
return 1;
@ -144,6 +146,7 @@ static unsigned int nf_nat_sip(struct sk_buff *skb, unsigned int protoff,
enum ip_conntrack_info ctinfo;
struct nf_conn *ct = nf_ct_get(skb, &ctinfo);
enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
struct nf_ct_sip_master *ct_sip_info = nfct_help_data(ct);
unsigned int coff, matchoff, matchlen;
enum sip_header_types hdr;
union nf_inet_addr addr;
@ -258,6 +261,21 @@ next:
!map_sip_addr(skb, protoff, dataoff, dptr, datalen, SIP_HDR_TO))
return NF_DROP;
/* Mangle destination port for Cisco phones, then fix up checksums */
if (dir == IP_CT_DIR_REPLY && ct_sip_info->forced_dport) {
struct udphdr *uh;
if (!skb_make_writable(skb, skb->len))
return NF_DROP;
uh = (void *)skb->data + protoff;
uh->dest = ct_sip_info->forced_dport;
if (!nf_nat_mangle_udp_packet(skb, ct, ctinfo, protoff,
0, 0, NULL, 0))
return NF_DROP;
}
return NF_ACCEPT;
}
@ -311,8 +329,10 @@ static unsigned int nf_nat_sip_expect(struct sk_buff *skb, unsigned int protoff,
enum ip_conntrack_info ctinfo;
struct nf_conn *ct = nf_ct_get(skb, &ctinfo);
enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
struct nf_ct_sip_master *ct_sip_info = nfct_help_data(ct);
union nf_inet_addr newaddr;
u_int16_t port;
__be16 srcport;
char buffer[INET6_ADDRSTRLEN + sizeof("[]:nnnnn")];
unsigned int buflen;
@ -326,8 +346,9 @@ static unsigned int nf_nat_sip_expect(struct sk_buff *skb, unsigned int protoff,
/* If the signalling port matches the connection's source port in the
* original direction, try to use the destination port in the opposite
* direction. */
if (exp->tuple.dst.u.udp.port ==
ct->tuplehash[dir].tuple.src.u.udp.port)
srcport = ct_sip_info->forced_dport ? :
ct->tuplehash[dir].tuple.src.u.udp.port;
if (exp->tuple.dst.u.udp.port == srcport)
port = ntohs(ct->tuplehash[!dir].tuple.dst.u.udp.port);
else
port = ntohs(exp->tuple.dst.u.udp.port);

73
net/netfilter/xt_bpf.c Normal file
View File

@ -0,0 +1,73 @@
/* Xtables module to match packets using a BPF filter.
* Copyright 2013 Google Inc.
* Written by Willem de Bruijn <willemb@google.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/filter.h>
#include <linux/netfilter/xt_bpf.h>
#include <linux/netfilter/x_tables.h>
MODULE_AUTHOR("Willem de Bruijn <willemb@google.com>");
MODULE_DESCRIPTION("Xtables: BPF filter match");
MODULE_LICENSE("GPL");
MODULE_ALIAS("ipt_bpf");
MODULE_ALIAS("ip6t_bpf");
static int bpf_mt_check(const struct xt_mtchk_param *par)
{
struct xt_bpf_info *info = par->matchinfo;
struct sock_fprog program;
program.len = info->bpf_program_num_elem;
program.filter = (struct sock_filter __user *) info->bpf_program;
if (sk_unattached_filter_create(&info->filter, &program)) {
pr_info("bpf: check failed: parse error\n");
return -EINVAL;
}
return 0;
}
static bool bpf_mt(const struct sk_buff *skb, struct xt_action_param *par)
{
const struct xt_bpf_info *info = par->matchinfo;
return SK_RUN_FILTER(info->filter, skb);
}
static void bpf_mt_destroy(const struct xt_mtdtor_param *par)
{
const struct xt_bpf_info *info = par->matchinfo;
sk_unattached_filter_destroy(info->filter);
}
static struct xt_match bpf_mt_reg __read_mostly = {
.name = "bpf",
.revision = 0,
.family = NFPROTO_UNSPEC,
.checkentry = bpf_mt_check,
.match = bpf_mt,
.destroy = bpf_mt_destroy,
.matchsize = sizeof(struct xt_bpf_info),
.me = THIS_MODULE,
};
static int __init bpf_mt_init(void)
{
return xt_register_match(&bpf_mt_reg);
}
static void __exit bpf_mt_exit(void)
{
xt_unregister_match(&bpf_mt_reg);
}
module_init(bpf_mt_init);
module_exit(bpf_mt_exit);

99
net/netfilter/xt_connlabel.c Normal file
View File

@ -0,0 +1,99 @@
/*
* (C) 2013 Astaro GmbH & Co KG
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/skbuff.h>
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_labels.h>
#include <linux/netfilter/x_tables.h>
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Florian Westphal <fw@strlen.de>");
MODULE_DESCRIPTION("Xtables: add/match connection trackling labels");
MODULE_ALIAS("ipt_connlabel");
MODULE_ALIAS("ip6t_connlabel");
static bool
connlabel_mt(const struct sk_buff *skb, struct xt_action_param *par)
{
const struct xt_connlabel_mtinfo *info = par->matchinfo;
enum ip_conntrack_info ctinfo;
struct nf_conn *ct;
bool invert = info->options & XT_CONNLABEL_OP_INVERT;
ct = nf_ct_get(skb, &ctinfo);
if (ct == NULL || nf_ct_is_untracked(ct))
return invert;
if (info->options & XT_CONNLABEL_OP_SET)
return (nf_connlabel_set(ct, info->bit) == 0) ^ invert;
return nf_connlabel_match(ct, info->bit) ^ invert;
}
static int connlabel_mt_check(const struct xt_mtchk_param *par)
{
const int options = XT_CONNLABEL_OP_INVERT |
XT_CONNLABEL_OP_SET;
struct xt_connlabel_mtinfo *info = par->matchinfo;
int ret;
size_t words;
if (info->bit > XT_CONNLABEL_MAXBIT)
return -ERANGE;
if (info->options & ~options) {
pr_err("Unknown options in mask %x\n", info->options);
return -EINVAL;
}
ret = nf_ct_l3proto_try_module_get(par->family);
if (ret < 0) {
pr_info("cannot load conntrack support for proto=%u\n",
par->family);
return ret;
}
par->net->ct.labels_used++;
words = BITS_TO_LONGS(info->bit+1);
if (words > par->net->ct.label_words)
par->net->ct.label_words = words;
return ret;
}
static void connlabel_mt_destroy(const struct xt_mtdtor_param *par)
{
par->net->ct.labels_used--;
if (par->net->ct.labels_used == 0)
par->net->ct.label_words = 0;
nf_ct_l3proto_module_put(par->family);
}
static struct xt_match connlabels_mt_reg __read_mostly = {
.name = "connlabel",
.family = NFPROTO_UNSPEC,
.checkentry = connlabel_mt_check,
.match = connlabel_mt,
.matchsize = sizeof(struct xt_connlabel_mtinfo),
.destroy = connlabel_mt_destroy,
.me = THIS_MODULE,
};
static int __init connlabel_mt_init(void)
{
return xt_register_match(&connlabels_mt_reg);
}
static void __exit connlabel_mt_exit(void)
{
xt_unregister_match(&connlabels_mt_reg);
}
module_init(connlabel_mt_init);
module_exit(connlabel_mt_exit);